Symptom Troubleshooting

Symptom Troubleshooting: Radio preset memory is lost

Radio preset memory is lost

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

1. Turn on the audio unit and set each of the radio station preset buttons.

Does each button set properly?
YES - Go to step 5.

NO - Go to step 2.


2. Make sure the ignition switch is in LOCK (0).

3. Remove the audio unit. Service and Repair

4. Measure the voltage between audio unit 20P connector terminal No. 10 and body ground.

Is there battery voltage?
YES - Go to step 5.

YES - Repair open in the wire between the No. 22 (15 A) fuse and under-dash fuse/relay box and audio unit 20P connector terminal No. 10.






5. Turn the ignition switch to LOCK (0) for 1 minute, then turn it back to ON (II).

6. Test the preset buttons for proper recall operation.

Do the preset buttons recall the set radio stations?
YES - System is normal at this time. Check connections at the audio unit.

NO - Replace the audio unit. Service and Repair